a) Explain how the voltmeter reading changes when the resistance of the variable resistor is increased. b) Resistor R2 has a resistance of 570 N. Calculate the value of the variable resistor R, when the reading on the voltmeter is 4.0 V.

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Chapter1: Units, Trigonometry. And Vectors
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6.
The circuit diagram below shows a potential divider. The battery has negligible internal resistance
and the voltmeter has infinite resistance.
12.0 V-
a) Explain how the voltmeter reading changes when the resistance of the variable resistor is
increased.
b) Resistor R2 has a resistance of 570 N. Calculate the value of the variable resistor R1 when
the reading on the voltmeter is 4.0 V.
Transcribed Image Text:6. The circuit diagram below shows a potential divider. The battery has negligible internal resistance and the voltmeter has infinite resistance. 12.0 V- a) Explain how the voltmeter reading changes when the resistance of the variable resistor is increased. b) Resistor R2 has a resistance of 570 N. Calculate the value of the variable resistor R1 when the reading on the voltmeter is 4.0 V.
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